New Hybrid Materials for Improved Hydrogen Production by the Sorption-Enhanced Steam Reforming of Butanol

作者：Dewoolkar Karan D; Vaidya Prakash D

来源：Energy Technology, 2017, 5(8): 1300-1310.

DOI：10.1002/ente.201600645

<jats:title>Abstract</jats:title><jats:p>Catalytically assisted steam reforming coupled with the selective separation of the produced CO<jats:sub>2</jats:sub> is a promising approach for improved H<jats:sub>2</jats:sub> production. In this work, we synthesized a new mixture (K‐Ni‐CaO/HTlc) of two potential sorbents CaO and hydrotalcite (HTlc), the promoter K, and the reforming catalyst Ni. This hybrid material was tested for the sorption‐enhanced steam reforming of butanol (SESRB) and its performance was compared to that of two unpromoted hybrid materials Ni‐CaO/HTlc and Ni‐CaO/Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>. All these hybrid materials were able to produce high‐purity H<jats:sub>2</jats:sub>. In particular, K‐Ni‐CaO/HTlc exhibited the highest H<jats:sub>2</jats:sub> concentration (98.7 mol %) and adsorption capacity (12.8 mol CO<jats:sub>2</jats:sub> kg<jats:sub>sorbent</jats:sub><jats:sup>−1</jats:sup>) at 823 K. The cyclic durability was tested for 25 cycles, and K‐Ni‐CaO/HTlc was stable for up to 21 cycles. Conversely, Ni‐CaO/HTlc and Ni‐CaO/Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> remained stable for 15 and 11 cycles only. The addition of K as a promoter was justified by the improved H<jats:sub>2</jats:sub> production and multicycle resilience. Finally, a plausible reaction mechanism for SESRB that predominates over the investigated hybrid materials was suggested.</jats:p>

• 出版日期2017-8